Crossword Genius

Even a smidgen of evidence (4)

Ross

I believe the answer is:

sign

'evidence' is the definition.
(I know that sign is a type of evidence)

'even a smidgen' is the wordplay.
'even' indicates alternate letters (even-numbered letters are used).
The alternating letters of 'smidgen' are 'SIGN'.

'of' acts as a link.

(Other definitions for sign that I've seen before include "Evidence" , "Notice; omen" , "Pointer - indicate agreement in writing" , "Manifestation" , "house" .)

I've seen this clue in The Guardian.
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